Feed mechanism for punching-machines.



No. 894,465. PATENTED JULY 28, 1908. A. RINDERER.

, FEED MECHANISM FOR PUNOHING MACHINES.

APPLIOATION FILED MAR. 6, 1 908.

3 SHEETS-SHEET l.

QZZaZ- PATENTED JULY 28, 1908'.

A. RINDERER. FEED MECHANISM FOR PUNGHING MACHINES.

3 SHEETS-SHEET 2,

APPLICATION FILED MAR. 6. 1908.

W f i. 1

No. 894,465. PATENTED JULY 28, 1908.

, A- RINDERER. FEED MECHANISM FOR PUNOHING MACHINES.

APPLICATION FILED MAR. 6. 1908.

3 SHEETS-SHEET 3.

, ALVIN RINDERER, oF' HIGHLAND, ILLIlfIOIS.

FEED MECHANISM FOR PUNGHING-MACHINES.

Specification of Letters Patent.

Application filed March 6, 1908. Serial No. 419,422.

To all whom it may concern:

Be it known that I, ALVIN RINDERER, a citizen of the United States of America, residing at Highland, in the county of Madison and State of Illinois, have invented certain new and useful Improvements in Feed Mechanisms for Punching-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specifica-' tion.

My invention relates to a feed mechanism for delivering sheets of material, such as metal, to the punches and dies of punching machines, the invention having for 1ts object theproduction of a simple and efficient feed mechanism which is operated intermittently and is controlled by the punch plun er of the punlchiing machine to which the mec anism is ap 1e igure I is a top or plan view of myfeeding mechanism with the punch plunger of a punching machine shown in cross horizontal section. Fig. II is a side elevation of the arts shown in Fig. I. Fig. III is an enarged vertical lon itudinal section taken on line IIIIII, Fig. Fig. IV is an ehd elevation of the feeding mechanism. Fig.'V is a .vertical cross section taken on line VV,

Fig. IV.

In the accompanyin drawings: A designates a sheet of materia suitable to be fed by my feedin mechanism and which as illustrated in igs. I, II and III is provided with a plurality of perforations a that are arranged in line with each other longitudinally of the sheet. The perforations are preferably ari ranged at the transverse center of the sheet,

and one or more of these perforations is adapted to receive a part of my feeding mechanism to accomplish ahesired movement of the sheet. I

1 designates the bed of a punching machine, 2 the dies su ported by said bed, 3 a strip er above the ies, and 4 a punch plunger tiat carries punches 5 adapted to pass through the stripper 3 and enter intothe dies 2. Upon the be 1 adjacent to the dies and punchesare posts 6 in which are 'ournaled a pair of feedrollers 7 connecte by intermeshing ars 8. One of the rollers. is. rovided withv a driving shaft9, see Fig. I to which power may be communicated for the purpose of rotating the feed rollers intermittentl 'to advance 'a sheet of material, to be punc ed, into a position v above the dies 2,.

yiv hile the punches are elevated from said ies'.

All of the parts thus far particularly described are known by me to be old and no invention per se is herein claimed for them. My invention has reference to means hereby the sheets of material to be punched are delivered to the feed rollers in such manner 1 as to provide for the delivery of the sheets by the feed rollers to the dies and punches at the roper time, which pro er time is regulated y the provision of suita le mechanism for causing the feed rollers and the punch plunger to operate in harmony, and which 1s not concerned in my improvement.' Y

Adjacent to the feed rollers 7 and extendin in a horizontal direction therefrom is a ta le 10 that is rovided with a slot 11 extendin longitu inally'thereof, see Figs. II

Patented July 28', 1908.

and II and upon which the sheets A of material to be punched are conducted to the feed rollers. The table 10 is preferably provided with side. guard flanges 12 and supported by a bracket 13 that is secui ed to t e ed 1 of the punching machine.

14 designates hangers depending from the table 10 and 15 is a shaft rotatably mountedin said hangers The shaft 15 has fixed to it at one of its ends a ratchet wheel 16 and it also has fixed to it, interme'diateofits ends, a trip arm 17 that has utility to be hereinafter set forth. 4 j i 18 is apull rod located beneath the table 10 and extending longitudinally thereof, and transversely relative to the shaft 15. This pull rod is loosely mounted in a box 19 supported by the'table and it has fixed to 1t at its inner end an arm 20 that is adapted to be engaged b the trip arm 17.

' 21 is a 0g located beneath the table and adjustably secured to the pull rod 18 and the upper portion of which is adapted to operate in the slot 11 of the table 10 and to enter into oneof the perforations a in the sheet of material to be .fed forwardly upon the table. The upper end of the dog is preferably beveled, in order that the sheet of material may readily become disengaged from the dog when the sheet of material has been move forwardly and is gripped by the feed rollers pull rod 18 operates is a retracting sprin 22 by which the pull rod is moved outwar y after each inward or forwardmovement thereof in sheet feeding action. Be-

tween the arm 20 and the box 18 is a cushion spring 23 of less strength than the retracting spring 22 and which serves as a shock absorber when the pull rod is moved outwardly by the retracting spring.

24 desi ates a pawl carrying arm loosely fitted to t e shaft 15 alongside of the ratchet wheel 16, and 25 is a pawl pivoted to said arm and arranged in engagement with said ratchet wheel.

26 is a connecting rod pivoted to the arm 24 and extending into juxtaposition with the feed rollers 7.

27 are osts surmounting the posts 6 in which the eed rollers 7 are j ournaled, and 28 is a rock shaft journaled in the posts 27. The rock shaft 28 extends transversely of the table 10 above the feed rollers 7 and it is provided with a crank arm 29 to which the connecting rod 26 is fitted.

30 is a pull arm fixed to the rock shaft and which is normally upheld or returned to an uplifted position by a lift spring 31.

32 is a trip arm fixed to therock shaft 28 and which 1s ada ted to be engaged by a part of thepunch p unger 4, such as the punch ead 4, each time that the punch head is elevated whereby the rock shaft 28 is retated in one direction during the upward movement of the plunger to bereturned in the opposite directlon under the influence of the lift spring 31 when the plunger againmoves downward.

1 In the practical use of my feeding mechanism, the sheets of material to be punched, after having been prepared with the perforations a therein, are placed upon the table 10, so that the forward ends of the sheet will be in proximity to the feed rollers 7 and the upper end of the dog 21 will extend throughone of the perforations in the sheet, as seen in the drawings. It will now be assumed that the trip arm 17 carried by the shaft 15 is in the position shown in Fig. III, being in roximit to the arm 20 of the pull rod 18. he unc plunger 4 being at this time in lowere position moves upwardly and as it so moves it acts to elevate the trip arm 32 with the result of causing a partial rotation of the rock shaft 28 and rearward movement of its crank arm 29. exert a ull upon the connecting rod 26, and the pawlbarrying arm 24is moved rearwardly to cause the pawl 25 to impart a partial rotation to the ratchet wheel 16 and the shaft 15. During the partial rotation of the shaft 15, the trip arm 17 is carried to the arm 20 car- Tried by the pull rod 18, and acts by pressure against said arm to impart forward movement ofthe ull rod, so that the dog 21 will act to feed tlie sheet A to the feed rollers 7. The feed rollers then immediately grip the sheet for feeding action, and after the. trip arm 17 has become disengaged from the arm 20, the pull rod 18 is returned to its normal The crank' arm 29 is thus caused to thereby, the connecting rod 26, and the pawl 25 are returned to their normal positions under the influence of the lift spring 31. It is to be noted that inasmuch as there is only a single trip arm 17 upon the shaft 15, a munber of strokes of the punch plunger are permitted before the ratchet wheel 16 is operated sufiiciently to again bring said trip arm into operative position, thereby providing for several punching operations before the next sheet of material placed u on the table is ad vanced to the feed rollers y the dog 21. In order that the trip arm 17 may be manually brought into operative position at any time to avoid delay in feeding action, I apply to the shaft 15 a handle arm 15 by which the shaft may be turned to any desired degree. I

To provide a ainst retrograde movement of the shaft 15, apply to said shaft a collar 15", see Fig. V, and attach to one of the hangers 14, a brake block 33 to which is attached a friction strip 34 that may be of leather or any other suitable material and which bears against the collar 15.

It is desirable in the use of my feeding mechanism to place the next succeeding sheet of material, to be unched, upon the table 10 and overlying tie precedin sheet after said sheet has been engaged by the feed rollers and in order that the succeeding sheet may not be drawn forwardly due to frictional contact with the preceding sheet, I provide a restraining dog 35 that is ivoted to the table 10 at 36, see Figs. II and II. This dog has a forward arm that is adapted to extend through the slot 11 in the table and enter into one of the erforations in the succeeding sheet to retarc it from forward movement when only a slight pull is exerted thereupon;

is drawn forwardly by the dog 21, so that the point of the restraining dog will move downwardly, thus permitting the escape of the sheet of material therefrom.

I claim 1. The combination with the plunger of a punching machine and feed rollers cooperable with said plunger, of a table adjacent to said feed rollers, a feeding dog located beneath the table and adapted to engage the sheets of material placed u on said table to move them to said feed rol ers, reciprocally mounted means by which said dog is carried, and means operable by said plunger whereby said dog carrying means is actuated for sheet feedin action, substantially as set forth.

2. The combination with the lunger of a punching machine and feed rol ers co6per able with said plunger, of a table adjacent to said feed rollers, a spring controlled pull rod mounted beneath said table, a sheet engagpunching machine and feed ro said feed rollers, a feeding dog adapted to engage the sheets of material placed uponv said table to move them to said feed, rollers,

spring controlled reciprocally mounted means b which said dog is carried, and means opera le by said plunger whereby said dog carrying means is actuated for sheet feeding act1on, substantially as set forth.

3. The combination with the lunger of a punching machine and feeding ro lers cooperable with said plunger, of asheet supporting table adjacent to said feed rollers, a pull rod reciprocally ositioned beneath said table, a dog carried y said pull rod and ada ted to engage the sheets of material lace upon said table, and means opera le by said plunger whereby said pull rod is actuated for sheet feedin action to deliver the sheets to said feed rol ers, substantially as set forth.

4. The combination with the lunger of a punching machine and feed ro ers cooperable with said plunger, of a table adjacent to said feed rollers, .a pull rod reciprocally ing dog carried by said pull rod, a rotatab e shaft, means carried by said shaft adapted to impart movement to said pull rod, and means operable b said plunger for impartifng iotation to sai shaft, substantially as set ort 5. The combination with the lunger of a.

punching machine and feed ro ers cooperable with said plunger, of a table adjacent'to said feed rollers, a spring controlled pull rod reciprocally mounted beneath said table, a

sheet en agin dog carried by said pull rod,

a rotata le s aft, means carried by said shaft adapted to impart movement to said pull rod, and means operable by said plunger for impartin rotation to said shaft, substantially as set orth.

6. The combination with the lunger-of a punching machine and feed r0 ers cooperable with said plunger, of a table adjacent to said feed rollers, a pull rod reciprocally mounted beneath said table, a sheet engag-- ing dog carried by said pull rod, an arm fixed to said ppll rod, a rotatable shaft, a trip arm carried ysaid shaft and adapted to engage the arm carried by said pull rod, and means o erable b said plunger for imparting rotat1on to sai shaft, substantially as set forth.

7. The combination with the 1plunger of a ers able with said plunger, of a table adjacent to cooper- I reciprocally mounted .beneath said table, a

sheet engaging dog carried by said pull rod an arm fixed to said pull rod, a rotatable shaft, a trip arm carried by said shaft and adapted' to engage the arm carried b said pull rod, and means operable by said unger for im arting rotation to said sha stantia ly as set forth.

8. The combination with the lunger of a punching machine and feed ro ers cooperable with said plunger, of a sheet supporting table adjacent to said feed rollers, a spring controlled pull rod reciprocally mounted beneath said table, a sheet engaging dog carried by said pull rod, an arm carried by said ull rod, a rotatable shaft, a trip arm carried by said rotatable shaft ada ted to engage the arm carried by said pul rod, a ratchet and pawl device associated with said shaft, a spring controlled trip arm adapted to be actuated by said plunger, and means of connection between said last named trip arm and said ratchet and pawl device whereby said .shaft is rotated, substantially as set forth.

9. The combination with the lunger of a punching machine and feed ro ers cooperable with said plunger, of a table adjacent to said feed rollers, a feeding dog adapted to engage the sheets of material placed upon said table to move them to said feed rollers,

reciprocally mounted meansby which said dog is carried, means operable by said plunger whereby said dog carrying means is actuated for sheet feeding) action, and a restraining dog supported y said table adapted to engage the sheets of material placed upon sai table, substantially as set forth.

10. The combination with the lunger of a punchin machine and feed rol ers cooperable wit said plunger, of a table adjacent to said feed rollers, a feeding dog ada ted to engage the sheets of material place upon said table to move them to said feed rollers, reciprocally mounted means b which s'aid dog is carried, means operable b ger whereby the dog carrying means is actuated for sheet feedi action, and a sprin controlled restraining og supported by sai table adapted to enga e the sheets of material laced upon sai table, substantially y said plun- 

